The Insulator,bushing, cataloged under National Stock Number 5970-01-104-9054, is classified within Federal Supply Class 5970 (Electrical Insulators and Insulating Materials) of the Electrical and Electronic Equipment Components group. The manufacturer of record is Department of the Army Hq United States Army Communications Research and Development Command. Government technical data includes 7 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5970-01-104-9054 |
| Primary Part Number | B4039977-3 |
| Item Name | Insulator,bushing |
| FSC / FSG | 5970 / 59 — Electrical Insulators and Insulating Materials |
| Manufacturer | Department of the Army Hq United States Army Communications Research and Development Command |
| Status | ACTIVE |
| Shank Height | 0.093 INCHES NOMINAL IN |
| Style Designator | SHOULDER |
| Material Document and Classification | MIL-M-20693, COMP A, TYPE 1 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Outside Diameter | 0.252 INCHES NOMINAL IN |
| Shank Outside Diameter | 0.140 INCHES NOMINAL IN |
| Inside Diameter | 0.115 INCHES NOMINAL IN |
| Material | PLASTIC POLYHEXAMETHYLENE AMIDE OVERALL |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| B4039977-3 | Department of the Army Hq United States Army Communications Research and Development Command (USA) |
| T308 015 403 | Lockheed Martin Librascope Corporation (USA) |
| Reference | Meaning |
|---|---|
| 606-990126-898 | 5/9 Secondary reference Cmc Electronics Inc |
| 4-6 | 3/9 Design control — primary reference Richco Inc |
| 606-990126-898 | 5/2 Secondary reference U.S. Government activity |
| 20-153063 | 5/9 Secondary reference Adage Inc |
NSN 5970-01-104-9054 is a Insulator,bushing, manufactured by Department of the Army Hq United States Army Communications Research and Development Command, classified under FSC 5970, Electrical Insulators and Insulating Materials. Status: active.
NSN 5970-01-104-9054 has 2 manufacturer part numbers on file: B4039977-3 (Department of the Army Hq United States Army Communications Research and Development Command), T308 015 403 (Lockheed Martin Librascope Corporation).
Key specifications for B4039977-3: Overall Height: 0.140 INCHES NOMINAL IN; Shank Height: 0.093 INCHES NOMINAL IN; Style Designator: SHOULDER; Material Document and Classification: MIL-M-20693, COMP A, TYPE 1 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL. 7 specifications are documented in the U.S. Government catalog.
Possible hazard — SDS may be required (DLA HMIC P). Hazard information on this page is shown exactly as it appears in the DLA record.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.